September 14, 2007

Monte Hieb's Flying Graphics

Planetologist Of The Week

Monte Hieb, sometime West Virginia Office of Miner’s Safety chief
engineer, can scarcely be accused of neutrality in the Climate Wars. Deservedly celebrated for
his web site on the fossils of the coal measures of Appalachia,
the amateur climate scientist has created a truly remarkable graph for The National Center for Policy Analysis"Global Warming Primer".

Coal enthusiasts
may have a case to make, but Hieb's peculiar history of palaeoclimate seems an improbable tool for recruiting scientists to the fossil fuel cause-- it rivals the Creation Museum's take on geochronology.

The Primer asks "Is there a relationship between CO2 and global temperature over the Earth's history ?" but the graphic answer provided its rhetorical question wildly exaggerates some extremes of palaeoclimate while ignoring the climate record of today. Yet Dallas's NCPA deserves the thanks of all Texans-- The Global Warming Primer may temporarily drive Aggie jokes out of circulation.

This harsh judgment stems from the Primer's poor timing - the latest peer reviewed assessment of CO2 past by palaeoclimatologists who respect the datainstead of playing statistical games with it appeared on the same day as Hieb's latest ,and most Orwellian, attempt to rewrite geological history :

Coupling of surface temperatures and atmospheric CO2 concentrations during the Palaeozoic era

Atmospheric
carbon dioxide concentrations seem to have been several times modern
levels during much of the Palaeozoic era (543–248 million years ago),
but decreased during the Carboniferous period to concentrations similar
to that of today1, 2, 3.
Given that carbon dioxide is a greenhouse gas, it has been proposed
that surface temperatures were significantly higher during the earlier
portions of the Palaeozoic era1. A reconstruction of tropical sea surface temperatures based on the 18O of carbonate fossils indicates, however, that the magnitude of temperature variability throughout this period was small4,
suggesting that global climate may be independent of variations in
atmospheric carbon dioxide concentration. Here we present estimates of
sea surface temperatures that were obtained from fossil brachiopod and
mollusc shells using the 'carbonate clumped isotope' method5—an approach that, unlike the 18O
method, does not require independent estimates of the isotopic
composition of the Palaeozoic ocean. Our results indicate that tropical
sea surface temperatures were significantly higher than today during
the Early Silurian period (443–423 Myr ago), when carbon dioxide
concentrations are thought to have been relatively high, and were
broadly similar to today during the Late Carboniferous period
(314–300 Myr ago), when carbon dioxide concentrations are thought to
have been similar to the present-day value. Our results are consistent
with the proposal that increased atmospheric carbon dioxide
concentrations drive or amplify increased global temperatures1,

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